Phonograph



Nov. 6 1923.

1,473,004 J. W. BISHOP PHONOGRAPH Filed Oct. 17 1921 T all whom it mayconcern:

Patented Nov. 6, 1923.

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JOSEPH W. BISHOP, 0F MUSKEGON, MICHIGAN, ASSIGNOR TO THE BRUNSWICK-IBALKE-COLLENDER COMPANY, OF CHICAGO, ILLINOIS, 'A CORPORATION DELA-WARE.

PHONOGBAPH.

Application filed October 17, 1921. Serial No. 508,810.

Be it known that I, JOSEPH W. Brsnor,

' a citizen of the United States, residing at uskegon, in the county ofMuskegon and State of Michigan, have invented certain new and usefulImprovements in Phonographs, of which the following is a specificatlon.

This invention relates to phonographs and has for its principal objectto provide a con-- struction in which the needle in reproducing willtravel along the same path with res ect to the record as the needle didin recording.

Another-object of the invention is to produce a' construction wherebythe needle will travel along the radius of the record duringreproduction.

Another object of the invention is to eliminate the customary tone armand connected parts, thereby enabling the phono- "graph mechanism to bemade much more compactly and at a lower cost.

Further obiects of the invention will be come apparent as thedescription is read in connection with the accompanying drawing showinga selected embodiment of the invention in which- Fig. 1 is a fragmentaryplan view illustrating the novel structure and a portion of the record;

Fig. 2 is a longitudinal sectional view on the line 2-2 of Fig. 1;

Fig. 3 is an end elevation showing the nee dle and needle support; and

Fig. 4 is a fragmentary detail illustrating a modification.

In the drawing, 10 indicates a top plate or I motor board, 11 arecord-table carrying a motor board and has a bifurcated end'14f record12, and adapted to be revolved by the customary mechanism, not shown. Abracket 13 is secured to the bottom of the provided with pivots 15 uponwhich is mounted a tubular member, or tone arm 16 equipped at its freeend with a sound box 17 I have shown the tone arm as having afrustoconical sound passage 18 communicating with the interior of thesound box 17 which is secured to a flange 19 on the tone arm. Within thesound box is the usual diaphragm 20 clamped between the tubes 21. Theupper portion of the sound box 22 converges as indicated in Fig. 2, andhas a U- shaped flange 23'to which is secured an upright 24, alsoU-shaped, and having at its upper end the arms, or brackets 25 to whicha yoke 26 is pivoted by screws 27 as indicated in Fig. 1. A pair of bars28 are connected with the yoke 26 and carry at their opposite ends ahorseshoe-shaped. frame 29, best shown in Fig. 3. A spring 30 issuitably secured to the upper portion bf the frame 29 and carries theneedle support 31 having an angular needle socket 32 in which a needle33 is adapted to be secured by means of a screw 34. The needle support31 is connected with one end of a rod 35, the opposite end of which ispivoted at 36 to an arm 37 of hell crank lever 38, having an arm 39connected by a rod 40 with the diaphragm 20. The axis of the pivot 36 isco-incident with the axis of the screws 27 so that the bars 28 carryingthe needle support can be freely wung about horizontal'axis passingthrough the screws 27 without eifecting the position of the bell cranklever 38. The axis of the pivots 15 is at right angles to a radius ofthe record table 11, and therefore the swinging movement of the soundbox and connected parts will be co-incident with the radius of therecord table. In order to prevent the weight of the moving parts fromeffecting the action of the needle, equalizing springs 41 are secured tothe bracket 13 at 42 and engage lugs 43 on the tube 16.

In operation the tone arm and sound box are swung to the left in Fig. 2until the needle 33 can be engaged with the record groove at the outsideof the record, the springs 41 acting to equalize the weight of theparts. As the record rotates, the needle traveling in the spiral groovegradually feeds toward thecenter of the table along the radiuscarrying'with it all the parts supported by the pivots 15. The rods 35and 40, and the bell crank lever 38 communicate the vibrations of theneedle to the diaphragm 20 from which the sound vibrations pass down thefrusto-conical passage 18 into the amplifier 44 which may be of any formdesired.

The angular form of the rod 40permits y an attachment, as may be founsound box can be very compactly arranged so as to take up very much lessroom. It

will also be obvious that the embodiment here shown can bemanufacturedat a very much lower cost than the phonographs at present in common use.

The construction illustrated in Figs. 1, 2 and 3 is intended toreproduce laterally cut records, but by providing the needle supportwith an arm 45, as indicated in Fig. 4, the device can be adapted toplay hill and dale records. This arm may be made as an integral part ofthe needle sup ort, or as most desirable.

I am aware that changes in the form and proportion of parts, and in thedetails of construction of my invention may be made withoutdeparting-from the spirit or sacrificing an of the advantages thereof,and .I reserve t e right to make all such changes as fairly fall withinthe scope of the follow ing claims.

I claim:

1. In a device of the class described, a sound box mounted to swingabout a horizontal axis, a frame pivoted to said sound box, a needlesupport carried by said frame and adapted to move along a radius of therecord table, arecord table adapted to support a record in the positionto act upon a needle in said support, a diahragm in said sound box, andmeans pivota 1y connected to the sound box for connecting said needlesupport with said diaphragm.

2. In a device of the class described, a record table, a sound boxpivoted to swing about an axis at ri ht angles to a radius of saidrecord table, a rame pivotally connected with said sound box, a needlesupport carried by said frame and adapted to move along a radius of therecord table, a diaphragm in said sound box, and means for connectingsaid needle support with said diaphragm.

3. In a device of the class described, a record table, a sound boxpivoted on s an axis at right angles to a radius of said record table, adiaphragm in said' sound box, a needle support adapted to move along aradius of the record table, means carrying said needle-support andpivotally connected with said sound box, and means including a pivotallever for operatively connecting said needle support with saiddiaphragm.

4. In a device of the class described, a. record table, a sound boxpivoted on an axis at right angles to a radius of said record table, aframe pivotally connected with said sound box on an axis parallel to thepivotal axis of said sound box, a needle support carried by said frameand adapted to trav erse a radius of the record table, a diaphragm 1nsaidsound box, and means for connecting said diaphragm and said needlesupport. Y

5. In a device of the class described, a record table, a sound boxpivoted on. an axis at right angles to a radius of said record table, aframe pivotally connected to said sound box on an axis at right anglesto said record table, a diaphragm in said sound box, p

with said sound box, and adapted to move-- along a radius of the recordtable, a diaphragm in said sound box, and means including links and abell-crank lever for connecting said needle support with said diaphragm.

7 In a device of the class described, a motor board or the like, arotatable record table disposed above the motor board or the like, apivotally mounted sound box disposed beneath the motor board or thelike, the pivotal axis of the sound. box being normal to the axis ofrotation of the record table, a needle adapted to engage a record on therecord table, and means operatively connecting the needle to the soundbox.

8. In a device of the class described, a motor board or the like, arotatable record table disposed above the motor board or the like, asound box disposed beneath the motor board or the like, means forpivotally mounting the sound box to swing in a plane substantiallycoincident with the axis of rotation of the record table, a travellingneedle adapted to engage a record on the record table, and meansoperatively connecting the needle to the sound box.

9. In a device of the class described, a motor board or the like, arotatable record table disposed above the motor board or the like, apivotally mounted sound box beneath the motor board or the like andhaving a diaphragm therein, the pivotal axis of the sound box beingnormal to the axis of rotation of the record table, a frame, a needlesupport carried by the frame, and means operatively connecting theneedle support with the diaphragm.

10. In a device of the class described, a

motor board or the like, a record table dis-' 11. In a device of theclass described, an

apertured motor board, a record table disosed above the motor board, asound box isposed beneath the motor board and hav- 5 ing a diaphragmtherein, means for pivotally mounting the sound box, a bracket rigidlysecured to the sound box and pro- JOSEPH W. BISHOP.

jecting through the aperture 'in the motor board, a frame pivotallyconnected to the bracket, a needle support carried by the 30 frame, and.means 0 eratively connecting the needle support wit the diaphragm.

